Journal of the Semiconductor & Display Technology (반도체디스플레이기술학회지)

The Korean Society Of Semiconductor & Display Technology (한국반도체디스플레이기술학회)
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Voltage Feedback AMOLED Display Driving Circuit for Driving TFT Deviation Compensation

구동 TFT 편차 보상을 위한 전압 피드백 AMOLED 디스플레이 구동 회로

  • Ki Sung Sohn (Department of Semiconductor Systems Engineering, Cheongju University) ;
  • Yong Soo Cho (Department of Semiconductor Engineering, Cheongju University) ;
  • Sang Hee Son (Department of Semiconductor Systems Engineering, Cheongju University)
  • 손기성 (청주대학교 시스템반도체공학과) ;
  • 조용수 (청주대학교 반도체공학과) ;
  • 손상희 (청주대학교 시스템반도체공학과)
  • Received : 2023.12.05
  • Accepted : 2023.12.18
  • Published : 2023.12.31
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Abstract

This paper designed a voltage feedback driving circuit to compensate for the characteristic deviation of the Active Matrix Organic Light Emitting Diode driving Thin Film Transistor. This paper describes a stable and fast circuit by applying charge sharing and polar stabilization methods. A 12-inch Organic Light Emitting Diode with a Double Wide Ultra eXtended Graphics Array resolution creates a screen distortion problem for line parasitism, and charge sharing and polar stabilization structures were applied to solve the problem. By applying Charge Sharing, all data lines are shorted at the same time and quickly positioned as the average voltage to advance the compensated change time of the gate voltage in the next operation period. A buffer circuit and a current pass circuit were added to lower the Amplifier resistance connected to the line as a polar stabilization method. The advantage of suppressing the Ringing of the driving Thin Film Transistor can be obtained by increasing the stability. As a result, a circuit was designed to supply a stable current to the Organic Light Emitting Diode even if the characteristic deviation of the driving Thin Film Transistor occurs.

Keywords

Acknowledgement

이 논문은 2023년도 정부(산업통상자원부)의 재원으로 한국산업기술진흥원의 지원을 받아 수행된 연구임(P0017011, 2023년도 산업혁신인재성장지원사업). 본 과제(결과물)은 2023년도 교육부의 재원으로 한국연구재단의 지원을 받아 수행된 지자체-대학 협력기관 지역혁신 사업의 결과이다(2021RIS-001). 본 연구는 IDEC에서 EDA Tool를 지원받아 수행하였습니다.

References

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